A dual gate MOS-based olfactory system functionalized using conducting polymers

An artificial olfactory system, capable of detecting and discriminating different volatile organic compounds, has a vast potential to solve several sensing challenges. The conducting polymers are a well-researched class of materials that have a demonstrated sensitivity to a wide range of volatile compounds. This work, presented here, demonstrates an olfaction system developed with the integration of gas sensitive conducting polymers into an array of Si-foundry based floating gate metal oxide semiconductor (FGMOS) sensors. The design of the sensor and the post silicon processing steps required to ensure compatibility of this silicon system with the conducting polymers is presented. The system's response to several different analytes have been measured and analyzed. A statistical method, principle component analysis (PCA), is used to extract information from the experimental data. The PCA analysis confirms successful detection and discrimination of the tested analytes.